CREATESTRUCT Structure

The CREATESTRUCT structure defines the initialization parameters passed to the window procedure of an application.

typedef struct tagCREATESTRUCT {
   LPVOID lpCreateParams;
   HANDLE hInstance;
   HMENU hMenu;
   HWND hwndParent;
   int cy;
   int cx;
   int y;
   int x;
   LONG style;
   LPCSTR lpszName;
   LPCSTR lpszClass;
   DWORD dwExStyle;
} CREATESTRUCT;

Parameters

• lpCreateParams
  Points to data to be used to create the window.

• hInstance
  Identifies the module-instance handle of the module that owns the new window.

• hMenu
  Identifies the menu to be used by the new window. If a child window, contains the integer ID.

• hwndParent
  Identifies the window that owns the new window. This member is NULL if the new window is a top-level window.

• cy
  Specifies the height of the new window.

• cx
  Specifies the width of the new window.

• y
  Specifies the y-coordinate of the upper left corner of the new window. Coordinates are relative to the parent window if the new window is a child window; otherwise coordinates are relative to the screen origin.

• x
  Specifies the x-coordinate of the upper left corner of the new window. Coordinates are relative to the parent window if the new window is a child window; otherwise coordinates are relative to the screen origin.

• style
  Specifies the new window's style.

• lpszName
  Points to a null-terminated string that specifies the new window's name.

• lpszClass
  Points to a null-terminated string that specifies the new window's Windows class name (a WNDCLASS structure; for more information, see the Windows SDK).

• dwExStyle
  Specifies the extended style for the new window.

Requirements

Header: winuser.h

See Also

Reference

CWnd::OnCreate

Other Resources

Structures, Styles, Callbacks, and Message Maps

Change History

Date	History	Reason
June 2010	Added a link in the description of the style parameter.	Customer feedback.